253374991 has 2 divisors, whose sum is σ = 253374992. Its totient is φ = 253374990.

The previous prime is 253374971. The next prime is 253375007. The reversal of 253374991 is 199473352.

253374991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253374991 - 2¹⁷ = 253243919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253374911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126687495 + 126687496.

It is an arithmetic number, because the mean of its divisors is an integer number (126687496).

Almost surely, 2^253374991 is an apocalyptic number.

253374991 is a deficient number, since it is larger than the sum of its proper divisors (1).

253374991 is an equidigital number, since it uses as much as digits as its factorization.

253374991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 253374991 is about 15917.7570970285. The cubic root of 253374991 is about 632.7826779394.

The spelling of 253374991 in words is "two hundred fifty-three million, three hundred seventy-four thousand, nine hundred ninety-one".